I found a (thing I would consider a) bug! It is very small. Most people would never see it, since the only reason to do this is when you find it for the first time, but if you switch from the kite shield to the golden shield while in a level (not the item select room), you drop back down to 10 health instead of staying at 13.
Also, when I set the options to allow pressing and holding to move, sometimes I'll go two spaces and right off an edge. Not sure what's happening there.
Oh, and it'd be nice if I could end a run from the menu or something, say if I realise I've grabbed the wrong gear or the start of a run went too badly.
Otherwise, I'm having a lot of fun with this. It's fairly different from the roguelikes I tend to play (dungeon crawl stone soup is the big one, and is entirely too much for the little playdate), but it's cute and does some interesting things. :3